I have an Akra slip on and am considering adding an x pipe. I'm in CA so I'm concerned about smog testing. I've read on other forums that it is difficult to pass the sniffer with 100 cell cats but pretty easy with 200 cell cats. I've asked several sponsors about getting 200 cell cats on the Akra mid pipes and they all say it isn't possible. Do you think I need 200 cell cats and how do I get in touch with IND? Also, are the primary cats and thus the O2 sensor affected?
2008 AW E92 M3: Stage II and DCT tune by BPM Sport, convenience coding + coding for mDrive w/Euro MDM (no iDrive) & alarm retrofit by BPM Sport, Fox Red interior, MRF Velaforza full exhaust, carbon fiber M Performance spoiler, carbon fiber BMW badges, black grills, black OEM M3 ZCP 19" wheels, 15/12mm spacers and AW painted reflectors